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10Gbps packaged VCSEL driver

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article image Dc coupling eliminates bias filters.

MAXIM Integrated Products, represented by Arrow Electronics , has introduced the MAX3975, a compact, 3.3V, 10Gbps packaged VCSEL driver.

The MAX3975 is suitable for XFP, XENPAK, XPAK, and X2 modules for multimode 10Gbps applications and is available in a tiny 2.5mm x 2.5mm CSP package.

This driver can be dc-coupled to the VCSEL, eliminating the need for bias filters, saving cost.

Operating from a single +3.3V supply, the MAX3975 has a programmable bias-current range of 1.5mA to 10mA and a programmable modulation-current range of 3mA to 12mA.

Input sensitivity is 250 millivolts peak-to-peak and input overload is 1000 millivolts peak-to-peak .

The MAX3975 generates only 0.8ps of deterministic jitter and 0.35ps root-mean-square of random jitter, while maintaining 28ps edge-transition times. The driver also has an output-disable function and an output-polarity-swap feature.

The MAX3975 is available in a 2.5mm x 2.5mm chip-scale package and operates over the 0°C to +85°C temperature range.

Evaluation kits are available to speed designs.

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